Heating-furnace



B. D. GRAY AND E. W. RUBENCAME, JR. HEATING FURNACE. n APPucAToN manMAR. e. 1911.

Patented Nov. 11, 1919.

2 SHEETS-SHEET 1.

3,0. GRAY AND E. w. RUBENCAML'JR.

HEATING FUHNACE.

APPLICATION FILED MAR.6.1911.

.Patented Nov. 11,1919.

' 2 SHEETS-SHEET 2.

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l fnv AA@ @M UNITED sTATEs PATEN BUDD D. GRAY AND W. RUBENCAME, JR., OFPHILADELPHIA, PENNSYLVANIA.,

ASSIGNORS TO THE HESS-BRIGHT MANUFACTURING COMPANY,

DELAWARE.

To all whom it may concern:

Be it known that we, Buon GRAY andI EDMUND W. RUBENCAME, Jr., citizensof the United States, residing at Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented certain new anduseful Improvements in Heating-Furnaces, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to heating furnaces and has reference moreparticularly to furnaces designed for heating comparatively small barsemployed in the formationfof the casing rings of antifriction' bearings,the aim of the invention being to produce a furnace with-a heatingchamber in which the bars may be conveniently introduced and in whichthe heat will be uniformly distributed so as to subject the bars to auniform and effective heating action with little or no liability of theformation of scale.

With this aim in view our invention consists of a furnace consisting ofan inclosing body-'provided with a heatmg chamber and with a pluralityof combustion chambers communicating therewith, the said cham-V theywill be acted on uniformly by the heat-,.

ing gases.

The invention further consists of improved means for controlling thedistribution of the heating gases 1n the heating chamber in order tomaintain the same at a uniform degree throughout the extent of thechamber. i

The invention consists also of certain improved details in the form andconstruction of the furnace which will be fully pointed out in thespecification to follow and the novel features of which will be setforth in the appended claims.

Specification of Letters Patent.

walls.

A CORPORATION 0F HEATINGQURNACE.

Patented Nov.. 11, 1919i.

Application ined March '6, 1917; serial'No. 152,546.

Fig. 3 is a transverse sectional elevation on an enlarged scale on theline b--b of Figs. 1 and 3. l

Referring to the drawings:

Uur improved furnace comprises an in closing body or casing 1 preferablyof elon gated form and of suitable material to withstand the high heatdeveloped and to prevent they undue radiation of the same, the

said body being formed with a front wall 2 and a rear wall 3. Within theinclosing body in.' rear of the front wall is an elongat-ed heatingchamber 4 which extends throughout the length of the body, and which atits upper end extends rearwardly in the form of a branch chamber 5beneath an arch 6 connecting the upper ends of the two 7, 8 and 9designate combustion chambers which extend horizontally through the rearwall and communicate at their outer ends with openings 10 through whichthe combustible gases from the burners are in troduced into thecombustion chambers. These vcombustion chambers at their inner lendsextend vertically as at 11 and commu nicate with the branch chamber 5, avertical bridge wall l2 being arranged between the combustion chambersand heating chamber to deflect the incoming hot gases upwardly so thatthey will pursue a circuitous course before they enter the heatingchamber. Fire bricks 13 are situated in the combustion chambers in rearof the bridge wall in such position that the incoming heating gases willimpinge against them and be deflected. upwardly, the bridge wall beingthus protected from the direct effect of the gases.

Flues 11a lead from the base of the heating chamber rearwardly and thenupwardly between the combustion chambers, and at the outer side of thesame and communicate with the outside atmosphere.

Extending through the front wall of the furnace are a plurality ofcircular holes or openings 14 arranged at intervals side by side withtheir inner ends communicating with the heating chamber so that the ilil i duced into the heating'chamber ing chamber in such position thatthe inner extremities of the bars will rest thereon and be supportedthereby. This ledge projects forwardly, as shown in Fig. 3,. from thefront face of the bridge lwa l, which latter constitutes in effect ashoulder extending .upwardly from the ledge and in position to have theinner ends of the bars to be heated abutted thereagainst, in order todetermine the extent of insertion ofthe bars in the heating chamber. Theopenings le are of a size to conform rather closely to the crosssectional form of the bars and are lined with fire brick or heatresisting collars 17, whereby the entrance of air around the bars to theheating chamber will be prevented, and the formation of scale obviated.

Due to the construction described, and more particularly the arrangementof the several combustion chambers side by side and communicating -bylcircuituous paths with the elongated heating -chamber at a plurality ofpoints, the gases are distributed in a uniform manner throughout theextent ofthe heating chamber and a uniform heat is maintained therein atall points in the the flame ofthe burning length of the same, gasesbeing directed against the fire bricks as they enter the combustionchambers whence the gases pass upwardly and over the bridge wall and aredeflected downwardly by the arch into the heating chamber. The bars tobe heated, with their inner portions projecting into the heating chamberas shown in Fig. 3, will be acted on by the heating gases and beeffectively and uniformly heated throughout the series.

We prefer in the operation of the furnace to prevent an absolutelycomplete combustion of the gases and to maintain a reducing atmosphereat all times, there not being admitted suflicient air to furnish therequired amount of oxygen necessary for complete combustion. Inconnection with this reducing atmosphere, the comparatively close fit ofthe bars in the holes by preventing air from entering at that point,will effectively avoid the production and formation of scale.

It may sometimes happen that, due to the non-uniformity of thecombustible mixture furnished by the burners and due to otherconditions, the heat may be more intense in one part of the heatingchamber than in another part, and to meet this condition we provide theflues 11LL with regulating dampers 18 to control the flow of theproducts of combustion to the outside. In the use of these flues for theregulation of the heat, if for instance it is found that the heat ismore intense toward the center of the chama horiinvention, and

menons ber,` then the dampers of will be closed and the others opened,which the two inner fines will cause the products of combustion at thecenter to fiow laterally toward theends and thus develop more heat atthe ends; and if the heat is more intense 'at the endsv of the chamber,the vdampers of the end fiues will be closedto cause the heating gasesto flow toward the center.

The end walls of the furnace are provided by. removable caps or closures19 lso that access may be gained to the heating4 cham'-v ber whendesired.

In the accompanying drawings and forechanic, that various changes may bemade in 4the form and construction of the parts without departing fromthe limits of the further it will be understood that the invention isnot limited to any par'- ticular form or vconstruction of the partsexcept in so far as vsuch limitations are specified inthe claims.

Having thus described our invention, what we claim is: i

1. A heating furnace comprising an elongated inclosing body havingtherein a heating chamber extending lengthwise thereof and closed at itstop and ends, said body being provided with a plurality of openingsextending throru l y veisely of the length of the chamber for theintroduction of the articles to be heated, means for directing theheating gases from the rear'in separate streams beneath` the top of thechamber downwardly onto the articles projecting through said openings,and fiues leading downwardly and rearwardly from the heating chamber andcommunicating with the atmosphere.

2, A heating furnace comprising an inclosing body having a heatingchamber therein closed `at its top and ends, and having a plurality voflopenings extending through its front and communicating with withopenings 17 leading tothe ends of the heating chamber, which openingsare closed gh the front wall transllfl , upper en acerbes the combustionchambers and heating champ` ber to deliect the burning gases in theirpassage tothe heating chamber. A 4. A heatinlglr furnace comprising aninavin an elongated heating chamber extending engthwise thereof andhaving a lurality of openings through the front wallp thereoftransversely vof the 'heat-I ing chamber and `communicating with thesame for the introduction of the articles to.

be heated,

said heating lchamber having a rearwardly extendin branch chamber at itsand-sai bod being w1th a plurality of com ustion c embers communicatingat branch chamber.

5. A heating furnace comprising aninclosing body avi an elongatedheatngchamber extending engthwise thereof and havinga` plurality of openingsthrough the front wall communicating' with the heating chamber for theintroduction of the articles to be heated, the said heating chamberhav,-

mg at its upper end'a branch 'chamber extending laterally rearwardly,and said body being provided also with a plurality of combustionchambers at the rear at their inner ends with said branch chamber, and avertical bridge wall beneath the branch chamber and between the combus-`tion` chambers and heating chamber.

6. A heating furnace comprising an inf closing body having therein ahorizontal heating chamber, Asaid body being provided tion chamber incommunicating with the bridge-wall' between the with a horizontalopening extending through the front wall thereof and communicating withthe heating chamberfor the introduc` tion ofthe articles to be heated, acombusg the rear portion ofthe body heating-chamber, a i 'combustionchamber and the heating chamber, and a horizontal edge extendingforwardly from the bridge-wall in positlon to support the ends of thearticles projecting through said openings; whereby the ends ofthearticles supported by said ledge may be lined up against the wall anduniform lengths of the articles presented in the heating chamber.

7. A'heating furnace comprising an in'- closing body having therein aheating chamrovided their innery ends. with thev communicating p vupwardly from ber, said body being provided with a plurality of openingsextending through its Ifront wall and communicating at their inner endslwith the heating chamber for the introducsective combustion chambers inthe path of t e incomingl products of combustion, and a bridge wall inthe rear of the fire bricks; whereb the burning gases will be" deflectedllpwar ly as they enter the heating chamer. Y

- 8. A heating furnace comprising an inclosing body therein at the frontand having a plurality of independent combustion chambers at the rearcommunicating with the heating cham ber, saidbody being providcd'withregulating flues communicating at their front ends with the base `of theheatin chamber and extending rearwardly there rom and thenupwardlbetween the combustion chambers and discharging tothe outside.

having "a heating chamber` 9. A heatlng `furnace comprising an in lclosing body having therein a heating chamber extending through the endsof the body and having an opening through the wali thereof'communicating with the heating .chamber for the introduction of thearticles to be'heated, means for supplying heating gases to thechambers, and removable closures for the ends of said heating chamber topermit access thereto.

y 10.1A heating furnace comprising an inclosing body having therein avheating chamber, said body provided with a horizontal opening extendingthrough the front thereof and communicating with the heating chamber to.be heated, a horizontal ledge in the heating chamber in position tosupport the inner portion ofl the article projecting through saidopening, and a shoulder extending the ledgey in `position to have theinner end of the article abutted against it.

In testimony whereof,we have affixed our signatures.

